CN106950191A - Supporting detection sample produces the experimental system of spectral characteristic in the case where electronics notes excitation - Google Patents
Supporting detection sample produces the experimental system of spectral characteristic in the case where electronics notes excitation Download PDFInfo
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- CN106950191A CN106950191A CN201710110708.6A CN201710110708A CN106950191A CN 106950191 A CN106950191 A CN 106950191A CN 201710110708 A CN201710110708 A CN 201710110708A CN 106950191 A CN106950191 A CN 106950191A
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- 230000005284 excitation Effects 0.000 title claims abstract description 19
- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 230000003595 spectral effect Effects 0.000 title claims abstract description 15
- 238000001328 terahertz time-domain spectroscopy Methods 0.000 claims abstract description 15
- 239000000523 sample Substances 0.000 claims description 35
- 239000000919 ceramic Substances 0.000 claims description 11
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 9
- 229910052750 molybdenum Inorganic materials 0.000 claims description 9
- 239000011733 molybdenum Substances 0.000 claims description 9
- 238000004458 analytical method Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- WMTSAHAFZXEJBV-UHFFFAOYSA-N [Ba].[W] Chemical compound [Ba].[W] WMTSAHAFZXEJBV-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 239000003574 free electron Substances 0.000 abstract description 6
- 230000005855 radiation Effects 0.000 abstract description 6
- 238000002474 experimental method Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000011897 real-time detection Methods 0.000 abstract description 2
- 238000010223 real-time analysis Methods 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910021389 graphene Inorganic materials 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 3
- 238000004611 spectroscopical analysis Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000985 reflectance spectrum Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3581—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using far infrared light; using Terahertz radiation
- G01N21/3586—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using far infrared light; using Terahertz radiation by Terahertz time domain spectroscopy [THz-TDS]
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention discloses the experimental system that a kind of supporting detection sample produces spectral characteristic in the case where electronics notes excitation, belong to terahertz emission spectral characteristic detection field.The system includes：Vacuum chamber, pumped vacuum systems, pivoting lever and electron gun；Pumped vacuum systems notes the experimental situation that excitation sample provides high vacuum for free electron；Pivoting lever, which can not only fix electron gun, can also control the angles and positions of electronics note excitation sample；A pair of observation windows of the upper and lower installation of vacuum chamber can conveniently realize that terahertz time-domain spectroscopy analyzer notes the radiation field produced under excitation in electronics to sample and carries out real-time detection and analysis, and a pair of observation windows of forward and backward installation can facilitate the situation inside experiment operator Real Time Observation vacuum chamber.Whole system of the present invention is reasonable in design, coordinates terahertz time-domain spectroscopy analyzer to use, and can conveniently realize the detection for producing terahertz emission spectral characteristic in the case where free electron notes excitation to sample.
Description
Technical field
The invention belongs to terahertz emission spectral characteristic detection technique field, and in particular to during a kind of supporting utilization Terahertz
Spectroanalysis instrument detection sample in the case where free electron notes excitation in domain produces the experimental system of the spectral characteristic of terahertz emission.
Technical background
THz wave (THz) refers to electromagnetic wave of the frequency between 0.1THz to 10THz, and THz wave is between microwave and infrared
Between ripple.THz wave has many unique properties, has in fields such as safety detection, imaging, biomedicine, radio communications
Important application.Because the frequency of Terahertz is very high, so its spatial resolution is also very high；Again due to the very short (skin of its pulse
Second-time), so with very high temporal resolution.THz imaging technology and THz wave spectral technology thus constitute terahertz
The two chief technologies hereby applied.Simultaneously as Terahertz energy very little, will not produce destruction to material, so
It is more advantageous compared with X-ray.Further, since the vibration of large biological molecule and the resonant frequency of rotational frequency are in Terahertz
Wave band, therefore Terahertz chooses seeds in grain, the agricultural such as good breeding and food-processing industry have good application prospect.Terahertz
Application hereby is still among continuous research, and the science prospect of its length and breadth of land is recognized the world over.
Terahertz time-domain spectroscopy analyzer is a kind of coherent detection technology equipment, and shaking for terahertz pulse can be obtained simultaneously
Width information and phase information, the absorption coefficient and refractive index of sample can be directly obtained by carrying out Fourier transformation to time waveform
Deng optical parametric.Graphene electron mobility is high, has in the especially research of THz radiation source of Terahertz science and technology important
Using.Electronics note excitation graphene sample, the chemical property of graphene can change, and the change of its chemical property can
Characterized with the change by refractive index and electrical conductivity.Graphene radiation spectrum is divided using terahertz time-domain spectroscopy analyzer
Analysis, you can obtain graphene electrical conductivity and variations in refractive index situation, this has weight for the research in graphene terahertz emission source
Big meaning.But existing terahertz time-domain spectroscopy analyzer platform can not provide high vacuum for electronics note excitation graphene sample
Experimental situation.So the suitable corollary system of invention design so that the set system and existing terahertz time-domain spectroscopy analyzer
Co-ordination, the spectral characteristic of convenient detection sample, needs with urgent reality.
The content of the invention
The present invention devises corresponding experiments supporting system according to existing terahertz time-domain spectroscopy analyzer, the system and
Terahertz time-domain spectroscopy analyzer is used cooperatively, and can conveniently be detected under free electron note excitation, the transmission produced by sample
The time-domain spectroscopy characteristic such as spectrum or reflectance spectrum.
The technical solution adopted by the present invention is：
A kind of supporting detection sample produces the experimental system of spectral characteristic in the case where electronics notes excitation, including：Vacuum chamber, take out
Vacuum system, pivoting lever and electron gun；
The pumped vacuum systems is used to provide vacuum chamber high vacuum environment；
The vacuum chamber is provided with observation window and chamber door, is additionally provided with sample stage inside it；Set in the chamber door
It is equipped with the twin-core electrode that electron rifle is powered；
The pivoting lever is divided into inside and outside two parts through chamber door, and electron gun is solid by half part in pivoting lever
Above sample stage, the pivoting lever outer half portion of rotating drum outside can change the angle of electron gun launching electronics note
Degree；
The pumped vacuum systems includes a mechanical pump for taking out system low vacuum, one take out system high vacuum molecular pump,
And for control machinery pump and the control platform of molecular pump normal work.
The observation window is to be respectively arranged at outside four upper and lower, forward and backward observation windows of vacuum chamber, upper and lower observation window
Terahertz time-domain spectroscopy analysis instrument probe is approached, for detecting simultaneously signal Analysis.
Six core electrodes are additionally provided with the chamber door, can be used for additional power source and modulation voltage is applied to sample,
It can be combined with Faraday cup measurement electronics note line size.
The electron gun is the electron gun specially designed for reality empty real check system, and electron gun mainly includes：It is coated with ceramics
Wire, cathode terminal, electron gun top crown, metallic support rod, molybdenum cylinder, ceramics pole, negative electrode and perforate positive plate.In molybdenum cylinder
Portion is provided with negative electrode and is fixed on the electron gun top crown back side, and the perforate positive plate is connected by ceramics pole and top crown, and
Position of opening and emission of cathode face are centrally located on same axis；
The electron gun top crown and perforate positive plate are oxygenless copper material, and negative electrode selects barium-tungsten dispense cathode, uses Laser Welding
Cathode weld is fixed on molybdenum cylinder inside by connection technology, and molybdenum cylinder is screwed in below electron gun top crown.Two of negative electrode
The wire for being coated with ceramics is respectively welded on binding post, the other end of two wires is connected respectively to two metals of twin-core electrode
On electrode, additional modulation power source can be heated to negative electrode by twin-core electrode and provide accelerating potential, so as to realize electronics
Rifle launching electronics.
The present invention can achieve the effect that using above technical scheme：Vacuumize using mechanical pump, molecular pump two-stage and be
System, can provide high vacuum (10 for free electron note excitation sample-4Pa experimental situation)；Pivoting lever can not only be fixed
Electron gun can also control the angles and positions of electronics note excitation sample；A pair of observation windows of the upper and lower installation of vacuum chamber can be with
Conveniently realize that terahertz time-domain spectroscopy analyzer notes the radiation field produced under excitation in electronics to sample and carries out real-time detection and divide
Analysis, a pair of observation windows of forward and backward installation can facilitate the situation inside experiment operator Real Time Observation vacuum chamber.The present invention
Whole system is reasonable in design, coordinates terahertz time-domain spectroscopy analyzer to use, and can conveniently realize and sample is noted in free electron
The lower detection for producing terahertz emission spectral characteristic of excitation.
Brief description of the drawings
Fig. 1 is the system structure diagram of the present invention；
Fig. 2 is the vacuum chamber partial top structural representation of the present invention；
Fig. 3 is the vacuum chamber chamber door side structure schematic view of the present invention；
Fig. 4 is the vacuum chamber chamber door main structure diagram of the present invention；
Fig. 5 is the vacuum chamber chamber door overlooking the structure diagram of the present invention。
In figure：1st, mechanical pump；2nd, molecular pump；3rd, control platform；4th, vacuum chamber；5th, observation window；6th, chamber door；7th, twin-core
Electrode；8th, electron gun pivoting lever；9th, six core electrode；10th, modulation power source；11st, terahertz time-domain spectroscopy analyzer signal connects
Receive probe；12nd, electron gun；13rd, sample stage.Wherein, twin-core electrode 7 includes：7-1, edge of a knife flange, 7-2, porcelain bushing, 7-3,
Metal electrode；Electron gun pivoting lever 8 includes：Half part in 8-1, pivoting lever outer half portion, 8-2, pivoting lever；
Electron gun 12 includes：12-1, the wire for being coated with ceramics, 12-2, cathode terminal, 12-3, electron gun top crown, 12-4, metal
Support bar, 12-5, molybdenum cylinder, 12-6, ceramics pole, 12-7, negative electrode, 12-8, perforate positive plate.
Embodiment
In order to further appreciate that the content of the invention, feature and effect of the present invention, with reference to the accompanying drawings and examples to this hair
It is bright to be described in further detail：
As Figure 1-Figure 5, apparatus of the present invention include mechanical pump 1, molecular pump 2, molecular pump and the and of mechanical pump control platform 3
Chamber exhaust hole, up and down front and rear each observation window 5 and chamber door 6, the chamber are provided with vacuum chamber 4, the vacuum chamber 4
Room door 6 is switched by slideway, and its outside is provided with twin-core electrode 7, electron gun pivoting lever outer half portion 8-1 and six core electrodes
9, inner side is provided with the interior half part 8-2 of sample stage 13 and electron gun pivoting lever.Its shell of vacuum chamber 4 is metal knot
Structure, the metal structure can bear high vacuum environment.
Principle schematic diagram of the present invention shown in reference picture 1 puts up whole experimental system, and vacuum chamber 4 is fixed into terahertz
Hereby on time domain spectroscopy instrument platform, terahertz time-domain spectroscopy two probe receivers 11 of analysis are approached into vacuum chamber respectively
4 two observation windows 5 up and down.
Reference picture 4 and Fig. 5 are the main view of chamber door 6 and overlooking the structure diagram, and sample is fixed on sample stage 13, passed through
Electron gun 12 is installed to half part 8-2 in electron gun pivoting lever, two negative electrodes of electron gun by fixed metallic support rod 12-4
Binding post 12-2 is connected respectively to two of twin-core electrode 7 metals for penetrating into chamber interior by being coated with the wire 12-1 of ceramics
On electrode 7-3, the outer end of twin-core electrode 7 is wired on modulation power source 10, can be negative electrode 12- by modulation power source 10
7 heating and and provide accelerate electronics high pressure, realize electron emission.
After the completion of above preparation, start to start this set experimental system, open mechanical pump 1, take out low true to whole system
Sky, when vacuum reaches 10Pa or so, opens molecular pump 2, to whole system pumping high vacuum.
When vacuum meets requirement of experiment (10-4Pa), modulation power source 10 is opened, starts the negative electrode 12-7 to electron gun 12
Heated, when negative electrode 12-7 temperature meets launch requirements, negative high voltage is added to negative electrode 12-7, make the launching electronics of electron gun 12, led to
The size of the emission current of electron gun 12 can be controlled by overregulating negative electrode 12-7 institute's making alives and acceleration high pressure size.
Rotating electron rifle pivoting lever outer half portion 8-1, control electronics note is applied to the angles and positions on sample, angle
It is about ± 80 degree to spend adjustable range.
Electronics note acts on sample, and sample electrology characteristic can change and outside radiated electromagnetic wave, the electromagnetic wave of generation
Radiation can by approaching above and below two terahertz time-domain spectroscopy analyzer probe receivers 11 of two observation windows 5 receive
Arrive, by spectroanalysis instrument can further complete pair signals time-domain spectroscopy analysis.Six core electrodes are additionally provided with chamber door 6,
Additional power source can apply certain voltage by the electrode for sample, be noted it is possible thereby to analyze sample after making alive with electronics
Act on the radiation spectral property produced.In addition, using six core electrode and with the use of devices such as Faraday cups, electricity can also be measured
The line size that sub- rifle 12 is launched.
Vacuum chamber 4 is also provided with former and later two observation windows 5, and vacuum chamber 4 can be conveniently observed by the two windows
Inner case, be easy to control electron gun 12 to be applied to position and angle on sample.
Claims (3)
1. a kind of supporting detection sample produces the experimental system of spectral characteristic in the case where electronics notes excitation, including：Vacuum chamber, take out true
Empty set system, pivoting lever and electron gun；
The pumped vacuum systems is used to provide vacuum chamber high vacuum environment；
The vacuum chamber is provided with observation window and chamber door, is additionally provided with sample stage inside it；It is provided with the chamber door
The twin-core electrode that electron rifle is powered；
The pivoting lever is divided into inside and outside two parts through chamber door, and electron gun is fixed on by half part in pivoting lever
Above sample stage, the pivoting lever outer half portion of rotating drum outside can change the angle of electron gun launching electronics note；
The pumped vacuum systems includes a mechanical pump for taking out system low vacuum, one take out system high vacuum molecular pump, and
For control machinery pump and the control platform of molecular pump normal work；
The observation window is to be respectively arranged at outside four upper and lower, forward and backward observation windows of vacuum chamber, upper and lower observation window to approach
There is terahertz time-domain spectroscopy to analyze instrument probe, for detecting simultaneously signal Analysis.
2. a kind of supporting detection sample as claimed in claim 1 produces the experimental system of spectral characteristic in the case where electronics notes excitation,
It is characterized in that：Six core electrodes are additionally provided with the chamber door, modulation voltage is applied to sample for additional power source, and
With reference to Faraday cup measurement electronics note line size.
3. a kind of supporting detection sample as claimed in claim 1 produces the experimental system of spectral characteristic in the case where electronics notes excitation,
It is characterized in that：The electron gun includes：Be coated with ceramics wire, cathode terminal, electron gun top crown, metallic support rod,
Molybdenum cylinder, ceramics pole, negative electrode and perforate positive plate；Molybdenum cylinder is internally provided with negative electrode and is fixed on the electron gun top crown back side, described
Perforate positive plate is connected by ceramics pole and top crown, and position of opening and emission of cathode face are centrally located on same axis；
The electron gun top crown and perforate positive plate are oxygenless copper material, and negative electrode is the barium-tungsten dispense cathode being fixed on inside molybdenum cylinder,
Molybdenum cylinder is fixed on below electron gun top crown；It is respectively welded on two cathode terminals that negative electrode top is set and is coated with ceramics
Wire, the other end of two wires is connected respectively on two metal electrodes of twin-core electrode, and additional modulation power source passes through twin-core
Electrode can be heated to negative electrode and provide accelerating potential, so as to realize electron gun launching electronics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710110708.6A CN106950191B (en) | 2017-02-28 | 2017-02-28 | Mating test sample generates the experimental system of spectral characteristic under electronics note excitation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710110708.6A CN106950191B (en) | 2017-02-28 | 2017-02-28 | Mating test sample generates the experimental system of spectral characteristic under electronics note excitation |
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| CN106950191A true CN106950191A (en) | 2017-07-14 |
| CN106950191B CN106950191B (en) | 2019-11-05 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007488A (en) * | 2017-11-29 | 2018-05-08 | 赫立科技（成都）有限公司 | One kind is used for the indoor apparatus for adjusting position of vacuum chamber |
| CN109580753A (en) * | 2018-10-10 | 2019-04-05 | 金华职业技术学院 | A kind of spectral measurement method of combination electrochemistry |
| CN109870423A (en) * | 2019-03-07 | 2019-06-11 | 中国科学技术大学 | Terahertz time-domain spectroscopy measuring system and method |
| CN110711070A (en) * | 2019-09-25 | 2020-01-21 | 张小伏 | Preparation method of far infrared graphene condom |
| CN113488831A (en) * | 2021-07-09 | 2021-10-08 | 电子科技大学 | Terahertz gas laser of electron beam pumping |
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| US3878392A (en) * | 1973-12-17 | 1975-04-15 | Etec Corp | Specimen analysis with ion and electrom beams |
| CN1412543A (en) * | 2001-10-18 | 2003-04-23 | 浙江大学 | Optical parameter measurement device of fluorescent powder for vacuum UV |
| CN201893313U (en) * | 2010-09-21 | 2011-07-06 | 安徽华东光电技术研究所 | Positive pole control electron gun applied in millimeter-wave travelling wave tube |
| CN202710465U (en) * | 2012-07-05 | 2013-01-30 | 中国科学院物理研究所 | Nano graphical system and photoresponse characteristic detecting device of nano graphical system |
-
2017
- 2017-02-28 CN CN201710110708.6A patent/CN106950191B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3878392A (en) * | 1973-12-17 | 1975-04-15 | Etec Corp | Specimen analysis with ion and electrom beams |
| CN1412543A (en) * | 2001-10-18 | 2003-04-23 | 浙江大学 | Optical parameter measurement device of fluorescent powder for vacuum UV |
| CN201893313U (en) * | 2010-09-21 | 2011-07-06 | 安徽华东光电技术研究所 | Positive pole control electron gun applied in millimeter-wave travelling wave tube |
| CN202710465U (en) * | 2012-07-05 | 2013-01-30 | 中国科学院物理研究所 | Nano graphical system and photoresponse characteristic detecting device of nano graphical system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007488A (en) * | 2017-11-29 | 2018-05-08 | 赫立科技（成都）有限公司 | One kind is used for the indoor apparatus for adjusting position of vacuum chamber |
| CN108007488B (en) * | 2017-11-29 | 2020-04-28 | 赫立科技（成都）有限公司 | Position adjusting device used in vacuum chamber |
| CN109580753A (en) * | 2018-10-10 | 2019-04-05 | 金华职业技术学院 | A kind of spectral measurement method of combination electrochemistry |
| CN109580753B (en) * | 2018-10-10 | 2023-08-01 | 金华职业技术学院 | Electrochemical-combined spectrum measurement method |
| CN109870423A (en) * | 2019-03-07 | 2019-06-11 | 中国科学技术大学 | Terahertz time-domain spectroscopy measuring system and method |
| CN110711070A (en) * | 2019-09-25 | 2020-01-21 | 张小伏 | Preparation method of far infrared graphene condom |
| CN113488831A (en) * | 2021-07-09 | 2021-10-08 | 电子科技大学 | Terahertz gas laser of electron beam pumping |
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